See, I would have probably gone with George Marshall, who was - when he wasn't busy planning the Meuse-Argonne offensive which caused Germany to give up in World War One, becoming a Brigadier General, being named the Army Chief of Staff and serving in that capacity for the duration of World War Two (he was credited by Winston Churchill with planning the Allied victory) and serving as Secretary of State and subsequently the president of the International Red Cross - the architect of the Marshall Plan, which is considered by many (clearly delusional) people to be the single US initiative most responsible for keeping Europe out of the hands of the Russians after World War Two and preventing the mistakes that were made after World War One from being repeated and possibly setting off World War Three. "